8620639620431 has 16 divisors (see below), whose sum is σ = 8743693724640. Its totient is φ = 8498055751680.

The previous prime is 8620639620377. The next prime is 8620639620433. The reversal of 8620639620431 is 1340269360268.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8620639620431 is a prime.

It is a super-2 number, since 2×8620639620431² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8620639620431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8620639620433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110141471 + ... + 110219711.

It is an arithmetic number, because the mean of its divisors is an integer number (546480857790).

Almost surely, 2^{8620639620431} is an apocalyptic number.

8620639620431 is a deficient number, since it is larger than the sum of its proper divisors (123054104209).

8620639620431 is a wasteful number, since it uses less digits than its factorization.

8620639620431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81226.

The product of its (nonzero) digits is 2239488, while the sum is 50.

The spelling of 8620639620431 in words is "eight trillion, six hundred twenty billion, six hundred thirty-nine million, six hundred twenty thousand, four hundred thirty-one".